Gianluca Sforna wrote: ...
[giallu@molzilla ~]$ ping trex ping: unknown host trex [giallu@molzilla ~]$ host trex trex has address 192.168.1.101
...
Are you running NIS as well?
Try changing the hosts line in /etc/nsswitch.conf into:
hosts: files dns
Mogens
-- Mogens Kjaer, Carlsberg A/S, Computer Department Gamle Carlsberg Vej 10, DK-2500 Valby, Denmark Phone: +45 33 27 53 25, Fax: +45 33 27 47 08 Email: mk@xxxxxx Homepage: http://www.crc.dk